GemFire XD provides statistics for analyzing system performance. Any
member of a distributed system, including GemFire XD servers, locators, and peer
clients, can collect and archive this statistical data.
GemFire XD samples statistics at a configurable interval and writes them
to an archive. The archives can be read at any time, including at runtime.
You can view and analyze runtime or archived historical data using these
stats is a command-line tool provided with the GemFire XD product.
- GemFire Visual Statistics Display (VSD) is a
graphical tool that is installed in the tools/vsd
subdirectory of the GemFire XD installation. See Using VSD to Analyze Statistics.
Note: GemFire XD statistics use the Java System.nanoTimer for nanosecond
timing. This method provides nanosecond precision, but not necessarily
nanosecond accuracy. For more information, see the online Java documentation
for System.nanoTimer for the JRE you are using with GemFire XD.
Note: Runtime viewing of statistics archives files is not necessarily
real-time, because of file system buffering.